Are there any other markings on it? One of our militaria experts might be more successful with it. Give it some time to be seen.
Just for the heck of it I "Googled" WW2 German armband and found this; "Jews with work papers might enter the Aryan Quarter, white Aryans were permitted to enter the Jewish Quarter. Each day Jews would go out to work in the barracks factory and return home that evening. Jewish workers were identified by an armband with a Star of David and a number which corresponded to the one on their work papers. Later they were issued square patches, to wear along with their armbands, on which was darned the letter "W" meaning "Wichtig" (important). This meant that they must be preserved and safeguarded, and that the Gestapo must not do them any harm." German Jewish WW2 ARMBAND from AUSCHWITZ camp, Dachau for sale
They look alike, but the one in the original photo seems more professionally done. I wonder if there is any significance to that. I think it requires more research (hint, hint).
Okay this will add to the confusion. A black W on white band - Jewish Holocaust Memory, WW2 armband, Yellow David star, JUIF, JOOD, JUDE, J
Oh bugger....will someone stop this USMC gang get together thing these guys on here have going...One more marine and I'm off to boyscouts forums.
Werkschutz Factory Guard Armband. See the armband near the bottom of this link: Third Reich Depot, military collectables, World War II, Nazi Germany
Werkschutz Factory Guard Armband. A little googling reveals such armbands were worn by "werkschutz" (factory guards). See the armband near the bottom of this link: Third Reich Depot, military collectables, World War II, Nazi Germany
After seeing KodiakBeer's post I agree it most likely is not a Jewish prisoner band. The "W" like Lou & Skipper said is too elaborate. I followed KB's suggestion and found there are a few other armbands that have a W. One for Firefighters here; Fire Fighters Armband Guessing it has something to do with identification of people who have Official duties much like an MP armband. The search continues for an exact match.
I'd guess that finding an exact match would be difficult. Surely, such armbands would be made locally and differ in detail from region to region or city to city.